<template>
  <div class="swiper-container" ref="cur">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(img,index) in productImg" :key="img.id" >
        <img :src="img.imgUrl" @click="useActive(index)" :class="{active:ifuseActive==index}">
      </div>
    </div>
    <div class="swiper-button-prev"></div>
    <div class="swiper-button-next"></div>

  </div>
</template>

<script>

  import Swiper from 'swiper'

  export default {
    data(){
      return {
        ifuseActive:0
      }
    },
    name: "ImageList",
    props:['productImg'],
    watch:{
      productImg(){
        this.$nextTick(()=>{
           new Swiper (this.$refs.cur, {
               // 如果需要前进后退按钮
               navigation: {
                 nextEl: '.swiper-button-next',
                 prevEl: '.swiper-button-prev',
               },
               slidesPerView:3,
               slidesPerGroup:1
           });
        });
      }
    },
    methods:{
      useActive(index){
        this.ifuseActive=index;
        this.$bus.$emit('changeImg',index)
      }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>